Ignition of a metallized composite solid propellant by a group of hot particles

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Abstract

The solid-state ignition of a metallized composite propellant (ammonium perchlorate + 14% butyl rubber +5% aluminum powder + 6% plasticizer) under local heating by several sources of limited power capacity (dimensions of the hot particle xp = 4 mm and yp = 2 mm) was studied by mathematical modeling. For the temperature of the heated steel particles and the distance between them varied in the ranges 700 < Tp < 1500 K and 0.1x p < Δx < 1.5xp, respectively, the values of Tp and Δx were determined for which the ignition delay corresponds to the initiation of combustion of the composite propellant by a single particle, by a plate at a constant temperature or by several particles. In the region of low initial temperatures of the local sources (Tp < 1100 K), the limiting values Δx → 0.1xp and Δx > 1.5xp, were identified for which the characteristics and mechanism of ignition of the propellant by a group of heated particles can be studied using the “plate–propellant–gas” model and the “single particle–propellant–gas” model, respectively. Decreasing the distance Δx at Tp < 1100 K decreases the induction period to 50% and reduces the minimum initial temperature of the source required to initiate propellant combustion from 830 to 700 K. At Tp > 1100 K, the ignition of the metallized composite solid propellant by a single or several particles can be studied using relatively simple one-dimensional models of condensed material ignition by a plate at constant temperature. The variation in the ignition delay in this case is less than 5%.

Original languageEnglish
Pages (from-to)694-702
Number of pages9
JournalCombustion, Explosion and Shock Waves
Volume52
Issue number6
DOIs
Publication statusPublished - 1 Nov 2016

Fingerprint

composite propellants
solid propellants
Solid propellants
ignition
Ignition
Composite materials
Composite propellants
ammonium perchlorates
Plasticizers
plasticizers
Steel
propellants
Propellants
Aluminum
rubber
Powders
Rubber
steels
solid state
aluminum

Keywords

  • heat removal
  • ignition
  • metallized composite solid propellant
  • modeling
  • plate
  • set of hot particles
  • single hot particle

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Cite this

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title = "Ignition of a metallized composite solid propellant by a group of hot particles",
abstract = "The solid-state ignition of a metallized composite propellant (ammonium perchlorate + 14{\%} butyl rubber +5{\%} aluminum powder + 6{\%} plasticizer) under local heating by several sources of limited power capacity (dimensions of the hot particle xp = 4 mm and yp = 2 mm) was studied by mathematical modeling. For the temperature of the heated steel particles and the distance between them varied in the ranges 700 < Tp < 1500 K and 0.1x p < Δx < 1.5xp, respectively, the values of Tp and Δx were determined for which the ignition delay corresponds to the initiation of combustion of the composite propellant by a single particle, by a plate at a constant temperature or by several particles. In the region of low initial temperatures of the local sources (Tp < 1100 K), the limiting values Δx → 0.1xp and Δx > 1.5xp, were identified for which the characteristics and mechanism of ignition of the propellant by a group of heated particles can be studied using the “plate–propellant–gas” model and the “single particle–propellant–gas” model, respectively. Decreasing the distance Δx at Tp < 1100 K decreases the induction period to 50{\%} and reduces the minimum initial temperature of the source required to initiate propellant combustion from 830 to 700 K. At Tp > 1100 K, the ignition of the metallized composite solid propellant by a single or several particles can be studied using relatively simple one-dimensional models of condensed material ignition by a plate at constant temperature. The variation in the ignition delay in this case is less than 5{\%}.",
keywords = "heat removal, ignition, metallized composite solid propellant, modeling, plate, set of hot particles, single hot particle",
author = "Glushkov, {D. O.} and Kuznetsov, {G. V.} and Strizhak, {P. A.}",
year = "2016",
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language = "English",
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T1 - Ignition of a metallized composite solid propellant by a group of hot particles

AU - Glushkov, D. O.

AU - Kuznetsov, G. V.

AU - Strizhak, P. A.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - The solid-state ignition of a metallized composite propellant (ammonium perchlorate + 14% butyl rubber +5% aluminum powder + 6% plasticizer) under local heating by several sources of limited power capacity (dimensions of the hot particle xp = 4 mm and yp = 2 mm) was studied by mathematical modeling. For the temperature of the heated steel particles and the distance between them varied in the ranges 700 < Tp < 1500 K and 0.1x p < Δx < 1.5xp, respectively, the values of Tp and Δx were determined for which the ignition delay corresponds to the initiation of combustion of the composite propellant by a single particle, by a plate at a constant temperature or by several particles. In the region of low initial temperatures of the local sources (Tp < 1100 K), the limiting values Δx → 0.1xp and Δx > 1.5xp, were identified for which the characteristics and mechanism of ignition of the propellant by a group of heated particles can be studied using the “plate–propellant–gas” model and the “single particle–propellant–gas” model, respectively. Decreasing the distance Δx at Tp < 1100 K decreases the induction period to 50% and reduces the minimum initial temperature of the source required to initiate propellant combustion from 830 to 700 K. At Tp > 1100 K, the ignition of the metallized composite solid propellant by a single or several particles can be studied using relatively simple one-dimensional models of condensed material ignition by a plate at constant temperature. The variation in the ignition delay in this case is less than 5%.

AB - The solid-state ignition of a metallized composite propellant (ammonium perchlorate + 14% butyl rubber +5% aluminum powder + 6% plasticizer) under local heating by several sources of limited power capacity (dimensions of the hot particle xp = 4 mm and yp = 2 mm) was studied by mathematical modeling. For the temperature of the heated steel particles and the distance between them varied in the ranges 700 < Tp < 1500 K and 0.1x p < Δx < 1.5xp, respectively, the values of Tp and Δx were determined for which the ignition delay corresponds to the initiation of combustion of the composite propellant by a single particle, by a plate at a constant temperature or by several particles. In the region of low initial temperatures of the local sources (Tp < 1100 K), the limiting values Δx → 0.1xp and Δx > 1.5xp, were identified for which the characteristics and mechanism of ignition of the propellant by a group of heated particles can be studied using the “plate–propellant–gas” model and the “single particle–propellant–gas” model, respectively. Decreasing the distance Δx at Tp < 1100 K decreases the induction period to 50% and reduces the minimum initial temperature of the source required to initiate propellant combustion from 830 to 700 K. At Tp > 1100 K, the ignition of the metallized composite solid propellant by a single or several particles can be studied using relatively simple one-dimensional models of condensed material ignition by a plate at constant temperature. The variation in the ignition delay in this case is less than 5%.

KW - heat removal

KW - ignition

KW - metallized composite solid propellant

KW - modeling

KW - plate

KW - set of hot particles

KW - single hot particle

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VL - 52

SP - 694

EP - 702

JO - Combustion, Explosion and Shock Waves

JF - Combustion, Explosion and Shock Waves

SN - 0010-5082

IS - 6

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